7014

• UCREFRP Catalog Number: 7014
• Author: Valdez, R. A. and A. Wasowicz.
• Title: Non-Lethal Stomach Pumping Technique To Recovery Gut Contents of Roundtail Chub ‎(
• USFW Year: 1992.
• Copyright Material: NO

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Table 1. A chronology of events to test and verify the non-lethal stomach pumping method for
humpback chub.

DATE EVENT

December 4, 1990 B/W requests permission from the ACT to conduct non-lethal stomach
pumping of humpback chub in Grand Canyon. ACf requests a
proposal to conduct a pilot study.

December 15, 1990 B/W submits a proposal to conduct a pilot study,

January 3, 1991 USFWS grants permission to pump up to 10 adult humpback chub as
a pilot study on the January 1991 B/W trip

January 10-12, 1991 B/W pumps stomachs of 8 adult humpback chub and 10 adult rainbow
trout near LCR as part of field pilot program

January 21, 1991 B/W submits a Stomach Pump Pilot Study Evaluation reporting the
results of the field pilot program

January 25, 1991 B/W presents results of pilot study to ACT. ACf requests a full
proposal for study to (1) evaluate efficiency of stomach flushing, (2)
determine if there is damage to pharyngeal mill ACf requests use of
a surrogate species, suggests bonytail at Dexter, NM

February 7, 1991 B/W requests use of 100 bonytail at the Dexter NFH

March 10, 1991 B/W is granted use of 100 bonytail at Dexter NFH

March 20, 1991 B/W submits a Feasibility Study Proposal to the ACf with plans to
conduct tests on bonytail at Dexter on Apri110-15, 1991 together with
field tests on roundtail chub on the Dolores River Apri14-12, 1991

Apri12, 1991 Concern is expressed about using the bonytail at Dexter as the
surrogate, suggest instead roundtail chub, Utah chub, or tui chub.
The ACf is advised that the study at Dexter is on hold

May 7, 1991 B/W is advised by USFWS to not use Dexter bonytails, and to use
Utah chub instead. The stomach pumping program is postponed
indefinitely

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